Warp stop-motion for looms.



- rATENTBD AUG. 1, 1905. H, WYMAN. WARE sToP MOTION PoR Looms.

APPLICATION FILED JUNE 30. 1903.

uNrrnD sTArns HORACE WYMAN, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMID PATENT orrion.

TON & KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A lCORPORATION OF MASSACHUSETTS. l y Y WARP sToP-lvloTloN Fon Looms.

No. l796,101.

To all whom, it may concern:

Be it known that I, HORACE WYMAN, a citizen of the United States, residing at Worcester, in the county of Worcester and State of 'Massachusetts have invented certain new Vand useful Improvements in Warp Stop-Motions for Looms, of which the following is a specification.

My invention relates to warp stop-motionv for looms, either mechanical or electrical, and particularly to that class of warp stop-motions in which two transverse rods or bars are used to support the warp-threads and drop devices with open end slots at their lower ends arey used which are supported on the warp-threads v intermediate connections ships the shipperlever and stops the loom.

In case of an electrical warp stop-motion the dropping of a drop device completes the electric circuit and operates mechanism to ship the shipper-lever and stop the loom all in theordinary and well-known way.

In the class of warp stop-motions referred to means are ordinarily provided to prevent the drop devices fromjumping olf or becoming disengaged from the warp-threads. These means ordinarily consist of a rod or bar extending through a slot in the upper part of the drop device in case said drop device has an upper slot therein, which rod or bar is secured to the end stands of the warp stop-motion. Incase the drop devices do not havea slot in their upper part, then a strip or bar extends over the upper ends of the drop devices. By reason of the rod or bar or strip extending over the drop devices to prevent their jumping off of the warps it is difficult to obtain access to a broken warp-thread on the falling of a drop device. y

The object of my invention is` to improve upon the construction of warp stop-motions of `the class referred to as now ordinarily made,

and more particularly to provide a movable supporting plate or bar permanently attached at each end of the warp-stop-motion frame and to connect with said plate or bar the meansor preventing the jumping up of the drop de-y Speccation of Letters Patent. v Application filed June 30, 1903. Serial No. 163,729.

Patented Aug. 1, 1905.

vices, so that by raising the bars or plates the means for preventing the jumping up of the drop devices will be raised'with the same and leave an open space for access to the broken` warp-threads.

My invention consists in certain novel features of construction of my improvements, as will be hereinafter fully described.

I have shown in the drawings a detached portion of a well-known form of mechanical warp stop-motion with my improvements apapplied thereto, but my improvements may be equally well applied to any well-known form of electrical warp stop-motion.

` Referring to the drawings, Figure l is a plan view of a detached portion of a warp stop-Inotion with my improvements applied thereto. Fig. 2 is a section on line 2 2, Fig. 1, looking in the direction of arrow a, same figure. The broken lines show the raised position of the hinged end plate. Fig. 3 shows a modified construction of the mechanism shown in Fig. 1. Fig. L is a section on line 44, Fig. 3, looking in the direction of arrow b, same ligure. The broken lines show the raised position of the hinged end plate; and Fig. 5 is an end view of the parts shown in Fig. 3, looking in the direction of arrow b, same figure, and also showing the operating mechanism of the rocking feeler-blade.

In the accompanying drawings, 1 represents the end plates, which are secured to the loomframe (not shown) in the ordinary way. 2 and 3 are transverse warp-supporting rods or bars connected at their ends to the end plates 1.

1 is a rock-shaft mounted at one end in suitable bearings on the frame 1 and having fast thereon the feeler-arm 5, carrying'the feelerblade 5. The arm 6 is fast on one end of the rock-shaft 4: and has a stud or roll 6 thereon which extends into au elongated slot 7 in alever 7 centrally pivoted at 8. The lever 7 is connected, through connector not shown, l with mechanism for moving the shipper-le bars 10 and 11 for the drop devices 12 and 13. Transverse bars 14 are secured at their ends to the end plates and act as stop-bars for the drop devices in their lowered position and against which they bear when engaged by the feeler-blade 5.y

The drop devices 12 have an opened end slot in their lower portion and a closed slot, in this instance, at their upper portion.

rIhedrop devices 13 have only one slot therein-an open-end slot in their lower portion.

The warp-threads 15 and 16 in this instance are divided into two planes by the transverse rods 2 and 3. The rod 2 supports one halt' of the warp-threads and the rod 3 the other half, and the planes of the warp-threads intersect each other intermediate the two rods 2 and 3.

The drop devices 12 and 13 are arranged in this instance in two series, one series supported on one half of the warp-threads, in this instance on the lower plane, and the other on the other half of the warp-threads, in this instance on the lower plane, as shown.

All of the above parts may be of the ordinary and well-known construction in warp stop-motions ofthe class referred to.

I will now describe my improvements. Each end plate of the warp stop-motion has in this instance a pin .17 supported thereon and extending in a horizontal plane, on which in this instance is permanently mounted, to have a pivotal or hinged motion, one end of a plate or bar 18. The plate or bar 18 has a hole 18 therethrough, through which extends the upper end of a latch or linger 19, which is pivotally supported in the opening 18 by a transverse pin 20. In the free end of the hinged plate or bar 18 are supported the ends of two movable transverse rods 21 and 22, which in case of the drop devices 12 having inclosed slots in their upper portion extend through said slots, as shown in Fig. 4. With the drop devices 13, which have no slots in their upper portion, the transverse rods 21 and 22 are dispensed with, and a strip 23 extends over the upper end ot' the drop devices and is in this instance secured at each end by .means of a pin 18, extending through an eyelet 23 in the end of the strip 23, as shown. The operation of my improvements will be readily understood by those skilled in the art.

It will be seen that when it is desired to obtain access to a broken warp-thread the hinged plates 18, one at each'end of the frame, are raised, and in case of the strip 23 being used with said hinged plates 18 the strip 23 is raised `with said plates, as shown in Fig. 2. In case the transverse rods 21 and 22 are used said rods are raised with said plates, as shown in Fig. 4. When the plates 18 are raised, the latch or linger 19 will rest on the projecting iange 24 on the inner side of the end plate 1, as shown by broken `lines in Figs. 2 and 4, and act to hold the plates 18 in their raised position, as shown by broken lines in Figs.`

2, 4, and 5. When the plates 18 are to bc lowered, the upper end of the linger 19 is moved toward the hinged end of the Vplate to cause the lower end to lnove onto the beveled edge 24 of the liange 24, as shown in Fig. 4.

The ad vantages ot'my improvements will be readily appreciated by those skilled in the art.

By supporting the means which prevent the jumping up of the drop devices movably at each end said means can be raised bodily to expose all ofthe ends of said drop devices and permit ot' their being placed upon the warpthreads or removed therefrom when said drop devices are made as shownin Fig. 2, and when said drop devices are made as shown in Fig. 4 the rods 21 and 22 can be withdrawn from the slots in said devices when it is required to remove the same from the warp-threads.

It will be understood that the details o1 construction of my improvements may be varied, if desired.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a warp stop-motion, a strip adapted to extend over the drop-bars to limit their upward movement, and means for supporting said strip at each end over the drop-bars, said means being pivotally mounted and adapted to be moved to carry said strip away from thc drop-bars, without detaching it ateither end, substantially as shown and described.

2. In a warp stop-motion, the combination with a strip to extend over the drop-bars and limit their upward movement, of means for supporting said strip over the drop-bars and for moving it away from the drop-bars, without detaching said strip at either end from its supports, substantially as shown and dcscribed.

3. In a warp stop-motion, the combination with two arms or supports, each pivotally supported and adapted to be moved on its pivotal support, of a strip attached at each end to said supports, to be moved therewith into operative position over the drop-bars, to limit their upward movement, or out of operative position, without detaching said strip at either end, substantially as shown and dcscribed.

4. In a warp stop-motion, the combination with a strip, of means permanently attached to said strip for supporting it in an operative position over the drop-bars, to limit their upward movement, and for supporting it in an inoperative position away from the drop-bars, substantially as shown and described.

5. In a warp stop-motion, the combination with the frame carrying warp-supporting rods or bars, of a hinged plate or bar at each end of the frame, and means for preventing the drop devices fromjumping oif of the warpthreads, said means attached to and moving with said hinged plates, or bars, substantially as shown and described.

6. In a Warp .stop-motion, the combination with the frame carrying Warp-supporting rods or bars, of a hinged plate or bar at each end of the frame, and means for holding said plate in its raised position, and means for preventing the drop devices from jumping off of the Warp-threads, said means attached to and moving with said hinged plate, substantially as shown and described.

7. In a Warp stop-motion, the combination with the frame carrying Warp-supporting rods or bars, of a movable plate or bar permanently attached at each end of the frame, and 'means for preventing the drop devices from jumping olf of the Warp-threads, said means attached to and moving With said perscribed.

A HORACE WYMAN. Witnesses:

J. C. DEWEY,` M. HAAs. 

